package com.heima.media.interceptor;

import com.heima.common.dto.User;
import com.heima.common.util.UserThreadLocalUtil;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UserInterceptor implements HandlerInterceptor {
    @Override  //进入Controller方法之前会先进入当前方法
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String userId = request.getHeader("userId");
        String name = request.getHeader("name");
        if(userId!=null){
            User user = new User();
            user.setUserId(Integer.parseInt(userId));
            user.setName(name);
            UserThreadLocalUtil.set(user);
        }
        return true; // 直接放行
//        return false; // 拦截==不会再进入到Controller的方法中了
    }

    @Override  //从Controller方法出来后会先进入当前方法
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        UserThreadLocalUtil.remove();
    }

}
